Nice game, but it would be good to be able to play user levels without going to another website. The level data could be retrieved as a read-only version of the edit mode without a password.
I'd also like to see a method to easily store a list of resources necessary for an upgrade/craftable item and then to highlight the resources needed on the map or main display, for easier recongition.
I really enjoy the stability(especially the codebase)of the game, but I'd like to see an option to autoconsumre resources for fuel and repairs, which may be useful for deep, damaging ventures.